1) Low Frequency and Acoustic Frequency
低频与声频
2) all bottom,low-frequency sound
低频声<声>
4) low-frequency noise
低频噪声
1.
Impact of indoor virescence on annoyance of indoor low-frequency noise;
室内绿化装饰对低频噪声烦恼度的影响
2.
Theoretical analysis of low-frequency noise radiated from bridge vibrations;
桥梁振动辐射低频噪声评估方法研究
3.
The investigation of relations between low-frequency noise subjective sensation and spectrum characteristics
低频噪声主观感知与频谱特征关系研究
5) low frequency absorption
低频吸声
6) Low-frequency sound wave
低频声波
1.
This paper puts forward a method based on online programmable analog device ispPAC10 s deferential amplification and the low-pass filter circuit for realizing the collection of the low-frequency sound wave signal.
提出了基于在线可编程模拟器件ispPAC10差动放大及低通滤波电路来完成低频声波信号的采集。
2.
The low-frequency sound wave is received in the laboratory.
为研究油井管线的声传输过程,测量井底动态参数,根据实际情况设计了一种结构特殊的低频声波换能器。
补充资料：超声频移诊断
超声频移诊断
ultrasonic doppler diagnosis
亦称“D型超声诊断法”。是应用多普勒效应超声探测血液流动和脏器活动的方法。此法可获得因回声频率变化(即多普勒效应)的信号音图、曲线图及多普勒图像。可对血流听诊、测速，获得横断面、纵剖面及侧面投影图。超声心动图可确切显示心脏某一指定部位血流速、向性数据。其最大优点为无损伤、操作简便、迅速、便于重复应用。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条